Core-setting plate.



No. 642,5!6. Patented Ian. 30, |900.

C..BR|GHAM & C. B. EMERY.

CURE SETTING PLATE.

(Application filed Jan. 28, 1899.)

(N0 Model.)

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9 NiTnD STATES PATENT rricn.

CHARLES BRIGHAM, OF WATERTOWN, AND CHARLES iB. MERY, OF SOMERVILLE, MASSACHUSETTS;

Comi-SETTING PLATE.

SPECIFICATION forming part of Letters Patent No. 642,51 6, dated January 30, 190C).

Application led January 28, 1899. Serial No. '703 ,680. (No models) To ctZZ whom, it may concern:

Be it known that we, CHARLES BRIGHAM, residing at Watertown, and CHARLES B. EMERY, residing at Somerville, in the county of Middlesex and State of Massachusetts, citizens of the United States, have invented new and useful Improvements in Core-Setting Plates, of which the following is a specification.

The object of this invention is to provide a simpleand effective combination of a patternplate, cores, and a core setting and holding lplate for uniformly setting and holding cores in such manner as to permit the making of castings having pockets or recesses therein of a required uniform depth.

Our invention is particularly adapted to setting dry-sand cores, only one end of which can be supported in the green sand of the ordinary iiask in use in foundries.

The invention consists in the combination, with a pattern-plate, of a removable core setting and holding plate resting upon said pattern-plate and provided with a plurality of perforations and cores loosely arranged in said perforations and uniformly supported by the pattern-plate, whereby to prevent sinking of the cores into the sand and to provide for recesses of uniform depth in the article to be cast, the thicknessof said core-setting plate being equal to the required depth of such recesses and said plate being adapted to set and hold said cores in proper position with relation to the cope and nowel of the ordinary foundry-flask while the green sand is being rammed up around them, as hereinafter described.

In the drawings like numerals refer to like parts throughout the several views thereof.

Referring to the drawings, Figure 1 is a plan view of our improved core-setting plate. Fig. 2 is a section on line 2 2, Fig. 1. Fig. 3 is a section through a iiask with our core-setting platein position therein. Fig. 4 is a view similar to Fig. 3 with the plate and pattern removed and the liask reversed. Fig. 5 is a section of a casting taken from the mold, Fig. 4. Fig. 6 is an enlarged section of a portion of our core-setting plate with a core in position. Fig. 7 is an enlarged section of aportion of a casting.

In the drawings we have illustrated our device as it is used in making a casting for the treads of stairs, in which there are pockets or recesses 2, adapted to receive and hold pieces of lead to prevent slipping thereon.

-Said pockets extend only part way through the casting 1 and have vertical sides 4.

In our improved method of casting we use the ordinary iiask consisting of a cope 10 and nowel 11, Fig. 3, the pattern 12, of wood or metal, being placed in the cope, and on this pattern we place the core-setting plate 13, which plate is equal in thickness to the required depth of the pockets 2 and has holes 14 therein, which pass through the plate 13 and are of any shape required. Said holes 14 have vertical sides or walls. The baked cores 15 are placed in the holes 14 in the plate 13, Fig. 3, and the green sand in the nowel rammed up around them, as shown in Fig. 3. Said baked cores are of similar shape in plan to the holes in the plate 13, but slightly smaller than said holes in outline and of a length sufficient to be firmly held in the sand in the nowel. The nowel and plate 13 are next removed from the cope and reversed. The plate 13 is then removed from the nowel and the pattern 12 from the cope. The cope is then replaced upon the nowel, as shown in Fig. 4, and the mold is in readiness for the casting.

It is evident that by the use of our coresetting plate having a plurality of perforations therein and removably supported upon a separate pattern-plate the pockets 2 in the finished casting will all be of the same depth, as the cores are all placed upon one even face-namely, on the upper side of the pattern 12, Fig. 3. This is very quickly and easily done, and when the casting is made the cores will remain stationary, as they have vertical sides, and the sand in the nowel is rammed in around them much tighter than the cores can be placed in the old method.

By the employment of a separate patternplate 12, placed immediately beneath and in contact with the removable perforated core setting and holding plate 13 it is possible to easily support the cores 15 in an even manner, so that no core will be liable to sink into the sand in the cope. Besides this, the use of the perforated core setting and holding IOO plate 13 alone or Without the pattern-plate 12 would result in producing a casting having holes or perfor-ations extended entirely through it, Whereas it is the object of our invention to produce a casting in which the pockets or recesses 2 shall extend only part way into the cast metal. Practical and satisfactory results would not be attained by making the plates 12 and 13 integral or rigidly connected together, for in that event if the openings 14 were made in the form of re cesses instead of perforations it would not be possible to make them of accurate form and uniform depth and keep them clear from obstruction without involving great trouble and expense.

It is an important advantage of our separate pattern-plate 12, and removable core setting and holding plate 13,With its perforations 14, that by employing plates 13 of any required thickness a corresponding required depth can be uniformly obtained for all the recesses in the metal casting to be produced and the cores 15 cannot possibly sink or become disarranged in preparing the mold.

Another advantage secured is the cheapness of our core-setting plate and pattern combined as compared With a pattern Where there are a large number of core-prints to be made and aiixed thereto.

Another advantage is'that the same coresetting plate may be used for different sizes or designs of the pattern 12.

In Figs. 6 and 7 We have illustrated a modified form of core 16, having a groove 17 therein, so that the pockets in the finished casting will have a projection or rib 18 therein to prevent the lead piece fromA coming out of said pockets.

We have described our invention as particularly adapted to casting staircase-treads, with pockets therein extending part Way through said casting; but it is evident that our device may be employed in a similar manner to produce a large variety of castings having recesses therein.

Having thus described our invention, what We claim, and desire by Letters Patent to secure, is-

The combination with a pattern-plate, of a removable core setting and holding plate resting upon said pattern-plate and provided with a plurality of perforations, and cores loosely arranged in said perforations and supported by the pattern-plate, to prevent sinking of the cores into the sand and to provide for recessesof required depth in the article to be cast, substantially as described.

In testimony whereof We have hereunto set our hands `in presence of two subscribing witmesses.

CHARLES BRIGHAM. CHARLESA B EMERY Witnesses:

CHARLES S. GOODING, WM. T. BRIGHAM. 

